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  2. List of GIS data sources - Wikipedia

    en.wikipedia.org/wiki/List_of_GIS_data_sources

    Data repository for the City of Philadelphia, which includes GIS data-sets relating to the Philadelphia region, available to view and download in various formats York County Open Data Portal: Data repository for York County, which includes GIS data-sets relating to York County PA, available to view and download in various formats

  3. GDAL - Wikipedia

    en.wikipedia.org/wiki/GDAL

    The Geospatial Data Abstraction Library (GDAL) is a computer software library for reading and writing raster and vector geospatial data formats (e.g. shapefile), and is released under the permissive X/MIT style free software license by the Open Source Geospatial Foundation.

  4. Shapefile - Wikipedia

    en.wikipedia.org/wiki/Shapefile

    The shapefile format is a geospatial vector data format for geographic information system (GIS) software. It is developed and regulated by Esri as a mostly open specification for data interoperability among Esri and other GIS software products . [ 1 ]

  5. Dell Software - Wikipedia

    en.wikipedia.org/wiki/Dell_software

    Dell Software was a former division of Dell with headquarters in Round Rock, Texas, United States. [3] Dell Software was created by merging various acquisitions (mainly Quest Software and Sonicwall) by Dell Inc., the third-largest maker of PCs and now a privately held company, to build out its software offerings for data center and cloud management, information management, mobile workforce ...

  6. List of national coordinate reference systems - Wikipedia

    en.wikipedia.org/wiki/List_of_national...

    The list of national coordinate reference systems (CRS) lists map projections officially recommended for existing countries.Given that every projection gives deformations, each country's needs are different in order to reduce these distortions.

  7. GIS file format - Wikipedia

    en.wikipedia.org/wiki/GIS_file_format

    One result of this was the emergence of free and open-source software libraries, such as the Geospatial Data Abstraction Library (GDAL), which have greatly facilitated the integration of spatial data in any format into a variety of software. [7]

  8. QGIS - Wikipedia

    en.wikipedia.org/wiki/QGIS

    QGIS is a geographic information system (GIS) software that is free and open-source. [2] QGIS supports Windows, macOS, and Linux. [3] It supports viewing, editing, printing, and analysis of geospatial data in a range of data formats.

  9. Data model (GIS) - Wikipedia

    en.wikipedia.org/wiki/Data_model_(GIS)

    [10]: 215 It was common in early GIS systems such as the Map Overlay and Statistical System (MOSS) as well as most recent data formats, such as the Esri shapefile, geography markup language (GML), and almost all spatial databases. In this model, each feature geometry is encoded separately from any others in the data set, regardless of whether ...